Cat Shit One (Japanese: キャットシットワン, Hepburn: Kyatto Shitto Wan) is a three volume manga series written and illustrated by Motofumi Kobayashi.

A computer-generated original net animation series of Cat Shit One by Studio Anima began release on IDA Entertainment's YouTube channel in Japan from July 17, 2010,[2] and in North America, Australia and New Zealand on February 5, 2011.

So far, only one episode has been released on Japan's YouTube channel on July 17, 2010, with plans for a 12-episode series currently in production, but as of 2023[update], no further news about this sequel was published.

An English dub was released on YouTube on February 5, 2011, and will be independently distributed on DVD and Blu-ray Disc via Amazon in North America.

[5] The recent Cat Shit One adaptation was nominated for Outstanding Achievement in an Animated Short category in the 9th Annual VES Awards.